Diodes Incorporated
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PI2DDR321 (Obsolete)

1-bit 2:1 1.35V/1.5V GDDR5 Mux Switch


PI2DDR321 is a 1 bit 2 to 1 GDDR5 mux operating at 1.35V/1.5V supply and is designed for GDDR5 memory bus with speeds up to 5 Gbps. It is used to gate the clock signal only when bus is active thus saving power. 


  • 1-bit 2:1 switch that supports up to 5Gbps GDDR5 signals
  • VDD 1.35V/1.5V +/- 5%
  • SEL and Global Enable
  • 170 μA typ. operating current
  • High impedance and low Coff channel output when disabled or deselected
  • Low RON: 8Ω typical @ VIN = 0V & IIN = 40mA
  • 3dB Bandwidth: 3.3GHz
  • Low insertion loss: -0.6dB (0≤f≤1GHz)
  • ESD: 2KV HBM


  • GDDR5 power management in GPU applications in notebooks

Product Specifications

Product Parameters

Analog or Digital? Analog
Configuration 2:1
Differential Channels 1
OtherFeatures N/A
Signal Type Single Ended
Voltage 1.5, 1.35

Technical Documents

Recommended Soldering Techniques


Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2602 2023-01-31 2023-07-31 Device End of Life (EOL)


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